Tides and Currents
Currents at George Washington Bridge (NOAA)
Currents at George Washington Bridge (WWW XTide)
Nautical Charts
Weather
Inwood Wind and Weather Forecast
NOAA's weather site has a section for the Pacific, Atlantic and Gulf coasts, Hawaii and the Great Lakes, including Small Craft Advisories and current sea temperatures.
The Weather Channel features a marine forecast page with wind speed, direction, sea state, air temperature, visibility, pressure, high and low tide, tidal range and a 24-hour outlook.